Point 1: The term "Master Debater" is a play on words because it sounds like masterbater. Plays on words are a highly used comedic element, and is often the punch line of jokes.

Point 2: Masturbation is a natural part of human life, and therefore, it is funny. Other natural parts of human life are the following; Sex, sexual orientation, race, bowl movements, anger, and fear. Jokes about these, no matter how much of a guilty pleasure they are, are funny.

Conclusion: Combining the comedic element of a play on words with a common thing that most humans share makes the term "Master debater" funny.
Best of luck

I will attack my opponents case as that is all I can really do at this point.

His 1st point) My opponenent is advocating that puns are funny and highly comical. He would be wrong as all puns or play on words are not funny even if used for the punch lie of a joke. As evidence it would be this. http://www.wordsellinc.com...

His 2nd point) Agreed that masturbation is a normal part of human life. He is advocating that because it is natural and a part of human life is funny. If that is true than nutrition, transport, respiration, excretion, regulation and locomotion must also be as equally funny. But since they are not his point is negated.